It is a secret—mark thou reveal it not.
这是个秘密——你可别泄露。
The secret source of humor is not joy, Mark Twain said, but sorrow.
马克•吐温(Mark Twain)曾说过，幽默的秘诀不是欢乐，而是悲伤。
Mark Twain said, "The secret of success is making your vocation your vacation."
马克·吐温说过：“成功的秘诀是把工作视为休假。”
Mark Twain said, "The secret of success is making your vocation your vacation."
马克·吐温说过：“成功的秘诀是把工作视为休假。”
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